Process of generating acetylene gas from carbid of calcium.



- ion,

PFJCESS 9F GENERHENG AlIEfYlENQ GAS FROMEARElD QFEALGlUll'l.

SPEQHHCATIOBW forming part of Letters Uriginel nnplicetion filedDeccniberlS, 1897, eeriel No. 136L714. Div

lln. 3*,1' 9, (N 52p Eminent 2 50. 859,448, dated. October 9, 12,990.

l end this application filed March 19,1900. $erial Acetylene Gee f2 mmGerbid of Gale; following e sneciiicellon. 33.3: in LilJlQD reletee toan improved process for the genemcion acetylene from-carand it consistsof ccrmin im "h are fully eel. forth in the neion, n has been petentedho nae in Fetenc No. 21,572,

L llfaln by Let e'tezn her 239,

m can-hi sen o the action of dampeidn ela-y r of TASS aren e openings ofthe carng new, .clesof the acetylene- These two defec'ie regllg up Joeevolution of the gas b e cerbid ceases to be in direct invention e0overcome o1.=noth,es iney be desired, of its linie residnnzn seneiilveto it njrilllll 1s g eening tacweber l of ece't: onnecl-ion w 1:;produced and second resnlh is which dssolvee enables. ii to p obtainedt1 etnnce which nleisl ure. eired to rot eny desired. generation in cartg out my invention I prefer to in c118 following manner: I cover thepieces of cal-bid with e protective coating or peiniccneisting chieflyof glucose, to which I. add vpetroleum and carbonate of lime in powder.following; is the formula for the paint which lpreferto use: glucose,fifty-five parts; pen. 1m, five earls, and carbonate of lime in powder,fort-y parts. This formula nm-y medified not only as regards therelative proportions of the ingredients, but also as regal-.15 aheirmanure. Thus instead of glu- 115 may employed when del the gene/revisionof the gas to degree, so that a more uniform my be obtained.

:ovement. in Prncesses for the Genera Z leciiaose, honey, molasses,Inannite,

. clmn has the defect.

,- may use cnyother enncal capable 0L dissolving or liquefying: e--fesrinsmnce, en er in either a crude er refined state, or the residuum from.the inz lnufecture of sugar and from distilleries, maltose, dent-line,and the like, as Welles mixtures and eombinmions of sugar together orwith other subs'cences in shorb, ell saccharine substances, such assacchzimlc and sncretes. On the other hand, for petroleum, the use ofwhich is to preserve the cnrbid frolnthe action of steam or moisture, lmay substitute Vaseline, tcrebint'n, nish. made with shellac, Wlbhcaoutchouqwith rosinywith indie-rubber, or with gutta-percha, or thelike--in short, every other chemical capable of forming an impermeablecoating. The powdered carbonate of lime, which is of heavy oils of F r,turpenbine, varsecondary importance int-he mixturmnmybe I replaced bychalk, talc, sulfur, fine sand, and the like. if desired,it1 may beomitted. This con-ting may be applied to ,nhe celcic carbid in anymanner found most convenient. For

instance, each piece may be dipped in or washed \vii'n the compoundcoating, or where the pieces are small they may be joined'or pr edintoa, conglomerate mass with the compound coating or may be coated. afterbeing; made into such. conglomerate 112.2255.

instead of covering thecerbid with the paint or coating it may be merely(nixed (after pe croleum has been added thereto) with one or more of theabove substances, which are capable of dissolving or liquefying thelime. These snbscances'mny be merely dissolveclin water.

My improvements are applicable to calcic cal-bid even where the samecontains other substances, such as magnesium or a, magnesium salt. HenceI do not limit, the invention in its application to pure carbid ofcalcium.

It is to be understood that, if desired, the glucose may be mixed winhother substances, such as powder of crystallized sugar or otherequivalent substance, and employed with or without acetic or other acidhaving the properhy of preventing the sugar, becoming brittle.

be' used as follows:

seventy parts of glucose,

IOC

' necessary; but

and

v posingthe carbid ter, but largely due'to moisture, as in out hasthequality ubility of the lime,

.In this manner the through the meshes and five partsof petroleum. Tothis may be added the-powdered carbonate of lime, if this maybe omittedin view of the use of the crystallized sugar and acetic acid, which actsas a binder. Other proportions maybe employed, if desired.

Where it is desired simply to secure the sol,- the petroleum or itsequivalent' is omitted.

While I' prefer to make the coating com-i plete as a mixture and applyall at once, it is nevertheless evident that the carbid'may b'e dippedin the petroleum first and subsequently coated with the solvent forlime.

My invention prevents continued genera: tion contact with waterprevented, and thus overcomes the great objections and dangersheretofore experiencedin small generators and lam ps,-d no to thepresence of considerable moisture in the damp lime inclosing the carshid, whichin time generates gas by-decomsumed and when no outlet isprovided, In

casea safety-valve is provided then, while' the danger, suits.

since the damp ceases, the loss of carbid'still're- With my inventionthis is obviated, lime is dissolved by the gluthe carbid as soon asformed. soluble lime freely flows of the basket or cage ofthecarbi'd-holder and automatically elimicose and leaves -nates itselffrom the remaining carbid of calcium. The petroleum or 'oilcoating ofthe carbididoes not prevent direct action of waprevents thedecomposition steam or light vapor, and consequently it playsan'important function in'acetylene-generating machines and lamps, wherethe same are run at intervals.

Oarbid treated in the mannerjherein set of retarding to a satisfactorydegree thegeneration of acetylene gas,

'. so that the generation of such gas is more uniformly produced and Hsudden variations in pressures obviated. This in small-lampsis agreatadvantage,since it secures a more steady flame, constant candle-power,and more uniform pressure. 1 1

' As far as I am aware ,the'treatment of carbid of calcium with acoating either for renthe lime solvent or for arresting 'the deringgeneration of gasley action of moisture or vapor separately or.'inconjunction was not Hencelfdonot known prior to myiuventi'on, confinemyself to the special means of securng those ends herein set out,

of gasafter the gas-valve has been closed when no gas is beingcon as anymeans ing the limetothe action of asubstance which is a solvent in thepresence of moisture to ren 'der the'liine soluble orfluid whereby itmay -flow by gravity away from the undecompdsed cal-bid." r

2. The method of which consists in first treating carbid Of calcium witha substance more or less impervious to moisture and also with asubstance which and in the presence of and contact with said substancessubjecting the carbid of calcium to the action of water whereby the saidaction of the water in decomposingthe carbid of calcium is retarded andthe moist lime produced is rendered-soluble vof gravity and abnormalgeneration of gas avoided.-v

3. The method of generating acetylenegas which consists insimultaneously subjecting carbid of calcium and glucose or itsequivalent to the action of water. I

4:. The method of generating acetylene gas a'nd'forming a solubleresidue which ccns'sts in treating carbid of calcium with water-inconnection with a substance, whichby double decomposition formsacetylene gas, and a resi" due soluble in water.

5. The method which consists in to, the action of water,

of. producing acetylene gas. subjecting calcium carbi'ijli and treatingthe spent carbid or lime with-a proportioned quantity of a carbohydratein the presence of-wat'er whereby a soluble product" is formed there:from and dissolved away from the untreated.- carbid. f

In testimony of which invention I'have hereunto set my hand. a y MARCPIERRE EMMANUEL LETANG. Witnesses: a

EDWARD P. MAOLEAN, GEORGE E. LIGHT.

generating acetylene gas.

and removed by the action i" so bstantially as quickly as 'forui'edis asolvent for lime when in moist condition, I

